AS 3668:2019 Flexible intermediate bulk containers — Non-dangerous goods
A.8 Emptying FIBCs
FIBCs can be emptied by suction, and certain types by blowing, but they are usually emptied by gravity; the flow characteristics of the contents and the cost of ancillary equipment will generally dictate which method is chosen.
When emptying by gravity, personnel should not stand under the FIBC, not put their arms between the base of the FIBC and a receiving vessel or similar, except where the FIBC is supported.
A.9 Inspection of multi-trip FIBCs
Before re-using multi-trip FIBCs consideration should be given to the possibility of contamination from previous contents, and an appropriate inspection should be made. FIBCs should be thoroughly examined by a competent person for damage to stitching/gluing/welding, surface abrasion cuts, tears or any other damage to the main body of the container, particular attention should be paid to the lifting loops or devices and their attachments.
When damage affecting the strength of the FIBC is discovered, it is imperative that the FIBC be taken out of service immediately.
A.10.1 Abrasion
The effect of abrasion is variable, but some loss in strength is to be expected. In extreme cases, the fabric becomes so worn that the outer yarns of the weave are severed. On lifting loops or devices, localized areas of abrasion may be caused by sharp edges while under tension; these can result in a serious loss in strength.
A.10.3 Ultraviolet degradation and/or chemical attack
Ultraviolet degradation and/or chemical attack are indicated by the weakening, softening or embrittlement of the material (sometimes with discolouration) so that the outer surface can be rubbed or plucked off and, in extreme cases, the outer surface may become powdered.
A.10.4 Damage to coatings
A high proportion of FIBCs are manufactured from coated woven polyolefin, and the coating may be on the inside or outside of the container. Consideration should be given to possible contamination of the contents by an unacceptable level of coating fragments if an inside coating is damaged, and to the increased possibility of moisture ingress (particularly if the contents are hygroscopic) where damage occurs to either the inside or the outside coating.